Check-rower



(No Model.) 2 Sheets Sheet 1.

A. W. THOMPSON. CHECK ROWER N. PETERS. Momho n her. wnhin lon.

I WITNESSES:

W ATTORNEYS.

(No Model.) 2 Sh eetsShee t 2.

'A; W. THOMPSON. GHEOK ROWER.

y; Patented Dec. 4, 1883.

it WT i '1 I Pg WITNESSES; W V

%TORNEYS.

. citizen of the UnitedStates, and a resident of of which the pulleys I, guiding the rope or ASA \V. THOMPSON, OF

ATENT FFICE.

MONMOUTH, ILLINOIS.

CHECK-ROWER.

SPECIFICATION forming part of Letters Patent No. 289,468, dated December 4, 1883.

Application filed July 14, 1883. (No model.)

To (ZZZ whom it may concern: Be it known that I, ASA W. THOMPSON, "a

Monmouth, in the county of WVarren and State of Illinois, have invented certain new and use ful Improvements in Check-Rowers; and I do hereby declare that the following is full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same, reference being had tothe accompanying drawings, which form a part of this specification, and in which- Figure 1 is a perspective view of my improved check-rower. Fig. 2 is a rear view of the cam and seed-slide operating mechanism. Fig. 3 is a detail view of the cam. Fig.4 is a front view of the cam and the bifurcated arm operated by the same. Fig. 5 is a top view of the entire mechanism, and Fig. (iis a detail view of the wire anda knob.

Similar letters of reference indicate corresponding parts in all the figures. i

My invention has relation to check-rowers; and it consists in the improved construction and combination of parts of the same, as hereinafter more fully decseribed and claimed.

In the accompanying drawings, the letter A indicates a portion of the planter-frame upon which the seed-boxes B are fastened, having a reciprocating slide, 0, sliding in the bottoms of the same, and having a bar or crosspiece, D, fastened upontheir tops. 'Iwo cross-pieces, E, are fastened upon the ends of thisbar and form bearings F, in which the check-shaft, G turns, and are provided upon their ends with upwardly-projecting arms H, upon the ends wire, are journaled. Upon the ends of the shaft are fastened two disks, J, having four, or more orless, bifurcated arms, K, extending from their periphery, through which arms the knotted check-rope passes, turning the disk onefourth revolution for each knot. A cylinder, L, having its ends cut to form each two diametrically-opposite curved points and two curved hollows, M and N, is secured upon the center of the shaft, the points upon one end of the cylinder or cam corresponding to the curved hollows upon the other end, and the points and hollows corresponding to the arms upon the ends of the shaft. The sides of the cylinder have four, or more or less, according to the number of arms, grooves 0, parallel with the axis of the same, and extendmg from near one end to near the other end, corresponding to the points and hollows upon the ends of the cylinder, and formingrounded recesses at one end, from which oblique grooves Q extend, passing from nearthe end of one groove to the end of the next groove, all the oblique grooves running parallel and the rounded recesses being in the same end of the grooves. A rock-shaft, R, is j ournaled in a transverse bearing upon the under side of the bar D, under the center of the cylinder, and has abifurcated arm, S, upon its rear end, the upwardlypointed ends of which are provided with antifriction rollers T, which bear against the waved ends of the cam-cylindenwhich will rock the arm and shaft, when revolved, the rounded pointsupon one side pushing the one end towardthe side, when the other end of the arm will enter the corresponding rounded hollow, rocking the arm to one side, when the following point upon the other end will push the arm to the other side, and so forth. The rear end of'the rock-shaft is polyganous, and a crank, U, is adj ustably fastened upon the same by means of a set-screw, W, while the pin X upon the lowerend of thecrank fits into a slotted upright 1 lug, Y, projecting from the seed-slide, which will be reciprocated as the shaft is rocked. An arm, Z, is pivoted at one end upon the bar D, rocking in a horizontal plane, and has an upwardly-projecting lug, a, upon its free end, which lug projects into the grooves in the surface of the cam-cylinder in which it slides, a spring, 2), serving to draw it back, slidingin the straight grooves after it has reached the end of the oblique grooves, which spring is fastened to the outer end of the arm at one end and to the upper side of the 'bar upon the seed-boxes at the other end.

The knotted eheck-wi re consists, preferably, of a number of knobs, c, shaped like a shankbutton, having a groove, cl, around the body, passing through the shank, in which groove the wire is placed, forming a loop, the end of which is twisted around the wire at the upper surface of the button, while the end of the other piece of wire (the other end of. which is fastened to a button in the same manner) is fastened to the shank of the button, thus form ing of a cam-cylinder having straight and inclined grooves in one of its heads, into which grooves a lug projecting from the end of a spring-actuated lever slides, has been shown and claimed in my former Patent No. 27 7 ,856, and I therefore do not wish to claim such construction, broadly, in this case, but

WVhatI claim, and desire to secure by Letters Patent of the United States, is

1. The locking mechanism consisting of a cylindrical cam having grooves in its surface parallel with the axis of the cylinder, forming rounded recesses at one end, and oblique parallel grooves passing from the rounded recesses, near the ends of the same, to the other ends of the grooves, and a pivoted arm having a lugproj ecting i nto andtraveling in the grooves, and a spring serving to draw the lug back in the straight grooves, as and for the purpose shown and set forth. 4

2. The combination of the cylindrical cam having curved points and hollows upon its ends, the points and hollows upon the ends corresponding to each other, as described, and having grooves in its surface running parallel with the axis of the cylinder and corresponding to the points and hollows upon the ends, and parallel oblique grooves passingbetween the'opposite ends of the straight grooves, the rock-shaft having the bifurcated arm provided with anti-friction rollers upon its ends bearing against the waved ends of the cylinder, and the pivoted arm having the lug projecting from its free end, and having a spring fastened to its free end drawing it laterally, as and for the purpose shown and set forth.

3. The herein-described check-rower, consisting of the revolving shaft, the bifurcated arms, the cam-oylinder having the waved ends, and the straight and oblique parallel grooves in its surface, the rock-shaft having bifurcated arm provided with anti-friction rollers, and the crank, the seed-slide having slottedvupright lug, the pivoted arm having projecting lug upon its free end, and the spring fastened to the free end of the arm and to the frame, all constructed and combined to operate as and for the purpose shown and set forth.

In testimony that I claim the foregoing as my own I have hereunto affixed my signature in presence of two witnesses.

' ASA XV. THOMPSON.

\Vitnesses: v

T. M. MILLEN, M. R. SHAW. 

